body {
    background-color: #f0f0f0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

canvas {
    border: 2px solid #000;
    background-color: #fff;
}

.snake {
    background-color: green;
}

.food {
    background-color: red;
}